don’t let the complex notation scare you - the core idea is extremely simple. the derivative of a regex R and a character c is simply whatever is left to match after removing the first character.
На МКАД загорелись две машины14:46，这一点在heLLoword翻译官方下载中也有详细论述
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Mollie Cole-Wilkin was interviewed by an AI agent before a conversation with a human recruiter
（四）吊销公安机关发放的许可证件。